Sorry, no. After installing and activating the plugin itself, you have to go and configure settings and then there's a check box to "enable" the plugin to actually start serving the viperbar. If you have not "enabled it", it still adds the css and js to the head of every live page, whether the viperbar is "enabled or not". So, you have to deactivate the plugin. On our site, which gets a lot of traffic, I cant afford to have extra css and js added to our live site on every page when I haven't even configured or enabled the plugin. I hope that makes sense. Beyond that, it is a very cool plugin in terms of functionality. I've since deactivated and removed for other reasons but it did not leave and traces behind other than the typical wp-options configuration entries in the db...